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Emmy-award winning actress Valerie Harper is fighting a rare form of brain cancer—while continuing to work, enjoying time with her family, and appreciating the joy in each day. Although there is no cure for her cancer, Harper has responded well to treatment—and her positive attitude knows no bounds. “I have to walk slower,” she says, “but after [this interview], I'm going to get out there and take a walk and breathe the beautiful air. It's a pretty day here. Seize the day!”

For babies with one of the rare genetic disorders called lysosomal storage diseases—such as Krabbe or Pompe disease—early diagnosis and treatment are critical. Many infants with these diseases die before their second birthday. But the trajectory of these young lives could be dramatically different with a $1 test performed at birth.

Until the last couple of decades, neurologists could only observe the consequences of Alzheimer's disease (AD)—and then examine the brain at autopsy. Today, a variety of brain-imaging techniques are providing neurologists with vivid pictures of the brain at work. In turn, these images are opening up new ways to diagnose and treat AD and many other neurologic conditions.